WEEK 4: MODELING PART II

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WEEK 4 MODELING PART II
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Mesh Tessellation Optimization

• They increase or decrease the number of faces
• Tessellation ? subdivides the faces in the
  selected area dividing single polygons into 2 or
  more add more resolution

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3D Booleans

• Powerful sculpting tools
• Enable you to cut/drill one form with another
  combine multiple objects into one, among other
  things
• Objects used in Boolean operations ? operands

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Editing Mesh

• Vertex Operations ? vertices can be copied,
  moved, deleted, rotated, twisted

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• Edge Operations ? edges can be moved, rotated,
  deleted
• Types of operation
• 1. Edge extrude
• 2. Edge divide
• 3. Edge turn (rotates the selected edge)
• 4. Edge visible/invisible

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• Face operations
• Face divide ? works like edge divide, but user
  can select a point anywhere inside the polygon as
  the point for the new vertex to appear
• Face extrusion ? a process that takes a selected
  face and extrudes it in/out from its current
  position

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Displacement Mapping

• Also known as deformation mapping ? affects the
  mesh, extending it outward or inward
• Can be used to create terrain models, etc

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• Base object must have a fairly substantial
  number of faces to create subtle curves and
  detail
• The faces should also be triangles rather than
  quads to avoid planarity problems

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• The displacement level or displacement strength
  setting is the adjustment for how much
  displacement occurs to the mesh

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Building Organic Forms

• Example . Human face ? so complex, has so many
  curves, hollows, and subtleties
• Use low-level tools such as edge extrusion and
  vertex pulling to construct complex object ?
  tedious but precise methods

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• Useful tools
• 1. Skinning
• 2. Metaballs
• 3. Subdivision surfaces

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• Skinning process ? connects the cross-sections
  with a surface mesh can be virtually seamless
  depending on the limits of the software

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• Metaballs ? form of modeling where you can build
  forms out of various-sized sphere
• The software blends the spheres together into a
  single mass
• Human heads, animals, etc

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• Subdivision surface ? consists of a mesh
  smoothing operation that analyzes the
  lower-resolution base object and uses splitting
  techniques to add additional faces that smooth
  out rough edges and emphasize details

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• It enables you to build and manipulate low to
  medium-poly mesh, yet have the mesh increase in
  resolution and smoothness any time
• Example. Geris Game, A Bugs Life, Toy Story 2,
  Monsters, Inc.